6th Grade Math Textbook, Fundamentals

Building A

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11-1

Three-dimensional figures have length, width, and height.

A is a three-dimensional figure with that

are all polygons. Each line segment where two faces meet is

called an. The point of intersection of three or more

edges of a polyhedron is called a (plural: vertices).

A polyhedron with faces that are all congruent is a

.

A is a polyhedron with two congruent and parallel faces

called. A prism’s lateral faces are rectangles. Any polygon

can form the bases of a prism. The shape of the base determines

the name of the prism.

bases

prism

regular polyhedron

edge

vertex

polyhedron faces

Three-Dimensional Figures

Objective To define, identify, and classify polyhedrons by their characteristics• To distinguish

between regular and not regular polyhedrons• To define, identify, and classify solid figures that have

curved surfaces

What three-dimensional figures are represented by these buildings?

Rectangular Prism

Edge

Height

Face

Bases

Vertex

Building A is shaped like a prism.

A is a polyhedron with only one base. The base can be any polygon.

The other faces of a pyramid are triangles. The shape of the base determines

the name of the pyramid.

pyramid

Triangular Pyramid

Building B is shaped like a pyramid.

Building B Building C

Square Prism (Cube) Triangular Prism

Rectangular Pyramid Square Pyramid